Author Contributions: Dr Garbutt had full access to all the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis. Study concept and design: Garbutt, Leege, Sterkel, Gentry, and Strunk. Acquisition of data: Garbutt, Leege, Gentry, and Strunk. Analysis and interpretation of data: Garbutt, Leege, Sterkel, and Strunk. Drafting of the manuscript: Garbutt and Leege. Critical revision of the manuscript for important intellectual content: Garbutt, Leege, Sterkel, Gentry, and Strunk. Statistical analysis: Garbutt and Leege. Administrative, technical, and material support: Leege and Gentry. Study supervision: Garbutt, Gentry, and Strunk.
Financial Disclosure: None reported.
Funding/Support: This publication was made possible by grant UL1 RR024992 from the National Center for Research Resources, a component of the National Institutes of Health and National Institutes of Health Roadmap for Medical Research.
Disclaimer: The contents of this article are solely the responsibility of the authors and do not necessarily represent the official view of the National Center for Research Resources or National Institutes of Health Roadmap for Medical Research.